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<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算机专业课学习系统</title>
</head>
<body>
<h2>表哥</h2>
<table border="1px" cellspacing="0" width="400" >
    <tr>
        <th>第一列</th>
        <th>第二列</th>
        <th>第三列</th>
    </tr>
    <tr>
        <td colspan="2">1</td>

        <td rowspan="2">3</td>
    </tr>
    <tr>
        <td>4</td>
        <td>5</td>



    </tr>
</table>
<hr>
<h3>合并6 7 10 11四个为一个</h3>
<table border="1" cellspacing="0" width="400">
    <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
        <td>4</td>
    </tr>
    <tr>
        <td>5</td>
        <td colspan="2" rowspan="2">6</td>

        <td>8</td>
    </tr>
    <tr>
        <td>9</td>

        <td>12</td>
    </tr>
    <tr>
        <td>13</td>
        <td>14</td>
        <td>15</td>
        <td>16</td>
    </tr>
</table>
</body>
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